body{
    background-size:100% 100%;
    background-attachment: fixed;
}
.form-group{
    margin-bottom: 0;
}
.error{
    color:red;
    padding-left: 150px;
    height:12px;
    vertical-align: center;
}
.div_login{
    width:500px;
    height:450px;
    float: right;
    border:1px solid;
    border-radius: 10px;
    background-color: rgba(239, 238, 241,0.65);  /*透明度*/
    margin: 150px;
    padding: 40px;
}
.container{
    margin-left: 180px;
    margin-top:350px;
    width: 400px;
    color:white;
    float:left;
}
